# Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


"""Implementation of Netflix's Frigga naming convention"""

class Naming(object):
  """Implementation of Netflix's Frigga naming convention"""

  @staticmethod
  def cluster(app=None, stack=None, detail=None):
    if not app:
      raise ValueError('`app` is required for generating names')

    if not detail and not stack:
      return app

    if not detail:
      return '{0}-{1}'.format(app, stack)

    return '{0}-{1}-{2}'.format(app, stack, detail)

  @staticmethod
  def server_group(app=None, stack=None, detail=None, version='v000'):
    if not app:
      raise ValueError('`app` is required for generating names')

    if not version:
      raise ValueError('`version` is required for generating names')

    return '{0}-{1}'.format(
            Naming.cluster(app=app, stack=stack, detail=detail), version)
